Post-treatment method of fluorescent powder for lamp

A fluorescent powder and ammonium fluoride technology, applied in the field of light sources, can solve the problems of loose and non-dense film, poor transparency of fluorescent powder, and affecting the external quantum efficiency of white light LED devices, so as to improve the light extraction rate, improve the external quantum efficiency, Consumption saving effect
CN102766459AInactive Publication Date: 2012-11-07FUDAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUDAN UNIV
Publication Date
2012-11-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of a light source and particularly relates to a post-treatment method of fluorescent powder for a lamp. According to the post-treatment method disclosed by the invention, reactive etching is carried out on the surface of the fluorescent powder by utilizing a mixed solution of ammonium fluoride and other acids so as to fully etch surface defects and passivate the surface. The post-treatment method comprises the specific steps of: etching a fluorescent powder surface by the mixed solution of the ammonium fluoride and the other acids, and filtering and separating out the fluorescent powder from the mixed solution; then respectively washing by de-ionized water and alcohol; and finally, drying and dispersing. The fluorescent powder processed by the post-treatment method disclosed by the invention has good dispersity and transparency. The fluorescent powder is used for preparing a white-light LED (Light Emitting Diode); with the adoption of the fluorescent powder, the back scattering rate can be reduced, and the light removing rate is improved, namely the external quantum efficiency of a device is improved; and the use amount of the fluorescent powder can be saved.
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Description

technical field

[0001] The invention belongs to the technical field of light sources, and in particular relates to a post-processing method of fluorescent powder for lamps. Background technique

[0002] Most of the current commercial electric light sources need to use phosphors for light conversion. Fluorescent lamps need to use three-primary phosphors to convert ultraviolet light into a certain proportion of red, green, and blue mixed white light, while white LEDs mainly use phosphors to convert blue light. The blue light or ultraviolet light generated by LED or ultraviolet UV-LED is converted into double complementary color or three primary color mixed white light respectively, and the technology of multi-chip white light LED is not yet mature.

[0003] It can be seen that, whether it is a gas discharge fluorescent lamp or a solid-state white light LED device, phosphors are an essential key material. At present, commercial phosphors are prepared by a high-temperature soli...

Claims

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